drm/nouveau/nouveau/perfmon: add interface files for current core voltage

Signed-off-by: Karol Herbst <nouveau@karolherbst.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/include/nvif/device.h b/drivers/gpu/drm/nouveau/include/nvif/device.h
index 09eaf6a..e0ed2f4 100644 (file)
--- a/drivers/gpu/drm/nouveau/include/nvif/device.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/device.h
@@ -63,6 +63,7 @@ u64  nvif_device_time(struct nvif_device *);
 #define nvxx_clk(a) nvxx_device(a)->clk
 #define nvxx_i2c(a) nvxx_device(a)->i2c
 #define nvxx_therm(a) nvxx_device(a)->therm
+#define nvxx_volt(a) nvxx_device(a)->volt
 
 #include <core/device.h>
 #include <engine/fifo.h>

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index 491c714..8e13467 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -34,6 +34,8 @@
 #include "nouveau_drm.h"
 #include "nouveau_hwmon.h"
 
+#include <nvkm/subdev/volt.h>
+
 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 static ssize_t
 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
@@ -512,6 +514,35 @@ static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO | S_IWUSR,
                          nouveau_hwmon_get_pwm1_max,
                          nouveau_hwmon_set_pwm1_max, 0);
 
+static ssize_t
+nouveau_hwmon_get_in0_input(struct device *d,
+                           struct device_attribute *a, char *buf)
+{
+       struct drm_device *dev = dev_get_drvdata(d);
+       struct nouveau_drm *drm = nouveau_drm(dev);
+       struct nvkm_volt *volt = nvxx_volt(&drm->device);
+       int ret;
+
+       ret = nvkm_volt_get(volt);
+       if (ret < 0)
+               return ret;
+
+       return sprintf(buf, "%i\n", ret / 1000);
+}
+
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO,
+                         nouveau_hwmon_get_in0_input, NULL, 0);
+
+static ssize_t
+nouveau_hwmon_get_in0_label(struct device *d,
+                           struct device_attribute *a, char *buf)
+{
+       return sprintf(buf, "GPU core\n");
+}
+
+static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO,
+                         nouveau_hwmon_get_in0_label, NULL, 0);
+
 static struct attribute *hwmon_default_attributes[] = {
        &sensor_dev_attr_name.dev_attr.attr,
        &sensor_dev_attr_update_rate.dev_attr.attr,
@@ -542,6 +573,12 @@ static struct attribute *hwmon_pwm_fan_attributes[] = {
        NULL
 };
 
+static struct attribute *hwmon_in0_attributes[] = {
+       &sensor_dev_attr_in0_input.dev_attr.attr,
+       &sensor_dev_attr_in0_label.dev_attr.attr,
+       NULL
+};
+
 static const struct attribute_group hwmon_default_attrgroup = {
        .attrs = hwmon_default_attributes,
 };
@@ -554,6 +591,9 @@ static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
        .attrs = hwmon_pwm_fan_attributes,
 };
+static const struct attribute_group hwmon_in0_attrgroup = {
+       .attrs = hwmon_in0_attributes,
+};
 #endif
 
 int
@@ -562,6 +602,7 @@ nouveau_hwmon_init(struct drm_device *dev)
 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
        struct nouveau_drm *drm = nouveau_drm(dev);
        struct nvkm_therm *therm = nvxx_therm(&drm->device);
+       struct nvkm_volt *volt = nvxx_volt(&drm->device);
        struct nouveau_hwmon *hwmon;
        struct device *hwmon_dev;
        int ret = 0;
@@ -613,6 +654,14 @@ nouveau_hwmon_init(struct drm_device *dev)
                        goto error;
        }
 
+       if (volt && nvkm_volt_get(volt) >= 0) {
+               ret = sysfs_create_group(&hwmon_dev->kobj,
+                                        &hwmon_in0_attrgroup);
+
+               if (ret)
+                       goto error;
+       }
+
        hwmon->hwmon = hwmon_dev;
 
        return 0;
@@ -638,6 +687,7 @@ nouveau_hwmon_fini(struct drm_device *dev)
                sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_temp_attrgroup);
                sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_pwm_fan_attrgroup);
                sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_fan_rpm_attrgroup);
+               sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_in0_attrgroup);
 
                hwmon_device_unregister(hwmon->hwmon);
        }